// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(
address indexed from,
address indexed to,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(
address indexed owner,
address indexed approved,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(
address indexed owner,
address indexed operator,
bool approved
);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId)
external
view
returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator)
external
view
returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
function toString(address account) internal pure returns (string memory) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint(uint160(account)) / (2**(8*(19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
s[2*i] = char(hi);
s[2*i+1] = char(lo);
}
return string(abi.encodePacked("0x", s));
}
function char(bytes1 b) internal pure returns (bytes1 c) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping owner address to token count
mapping(address => uint256) internal _balances;
// Mapping from token ID to owner address
mapping(uint256 => address) internal _owners;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner)
public
view
virtual
override
returns (uint256)
{
require(
owner != address(0),
"ERC721: balance query for the zero address"
);
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId)
public
view
virtual
override
returns (address)
{
address owner = _owners[tokenId];
require(
owner != address(0),
"ERC721: owner query for nonexistent token"
);
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId)
public
view
virtual
override
returns (address)
{
require(
_exists(tokenId),
"ERC721: approved query for nonexistent token"
);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator)
public
view
virtual
override
returns (bool)
{
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
virtual
returns (bool)
{
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
address owner = ERC721.ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(
ERC721.ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try
IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
)
returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert(
"ERC721: transfer to non ERC721Receiver implementer"
);
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
function set(Counter storage counter, uint256 value) internal {
counter._value = value;
}
}
pragma solidity ^0.8.0;
interface IWhitelisted {
function whitelistedMint(bytes32[] calldata _merkleProof, uint256 _mintAmount) external payable;
function whitelistedMint(address _to, bytes32[] calldata _merkleProof, uint256 _mintAmount) external payable;
function isWhitelisted(bytes32[] calldata _merkleProof) external view returns (bool);
function isWhitelisted(address _user, bytes32[] calldata _merkleProof) external view returns (bool);
function setWhitelistedCost(uint256 _newWhitelistedCost) external;
function setWhitelistedRoot(bytes32 _newWhitelistedRoot) external;
}
interface IGiveaway {
function giveawayMint(uint256 _total, bytes32[] calldata _merkleProof, uint256 _mintAmount) external;
function giveawayMint(address _to, uint256 _total, bytes32[] calldata _merkleProof, uint256 _mintAmount) external;
function giveawaysOf(address _to, uint256 _total, bytes32[] calldata _merkleProof) external view returns (uint256);
function setGiveawayRoot(bytes32 _newGiveawayRoot) external;
}
interface IGames {
function gameMint(address _to, uint256 _mintAmount) external;
function gamesOf(address _to) external view returns (uint256);
function addGames(address _to, uint256 _newGames) external;
function removeGames(address _to, uint256 _newGames) external;
}
interface ILocking {
function unlock(address _user, uint256 tokenId, uint256 code) external;
function lock(address _user, uint256 tokenId, uint256 code) external;
function isLocked(uint256 tokenId) external view returns (bool);
function isLocked(address _user, uint256 tokenId) external view returns (bool);
function lockedAt(uint256 tokenId) external view returns (uint256);
function lockedAt(address _user, uint256 tokenId) external view returns (uint256);
function lockedList() external view returns (uint256[] memory);
function lockedList(address _user) external view returns (uint256[] memory);
function setDisableLocks(bool _state) external;
function locked(address _user, uint256 tokenId, uint256 code, bool _state) external;
}
interface IBanning {
function isBanned(address _user) external view returns (bool);
function banned(address _user, bool _state) external;
function transferFromBanned(address _to, uint256 tokenId) external;
}
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
contract HollywoodApesV2 is ERC721, Ownable, IWhitelisted, IGiveaway, IGames, ILocking, IBanning {
using Address for address;
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private _totalSupply;
string public baseURI;
string public notRevealedUri;
uint256 public cost = 0.08 ether;
uint256 public whitelistedCost = 0.05 ether;
uint256 public maxSupply = 9000;
uint256 public revealed;
bool public whitelistPaused = true;
bool public giveawayPaused;
bool public gamesPaused;
bool public mintPaused = true;
bool public exchangeOpen;
bool public disableLocks;
bytes32 public whitelistedRoot = 0xa6e4dad26037d78e4f5abac1b4b3cd9f941d30623c13526d8e8b1b2ba1341b57;
bytes32 public giveawayRoot = 0x2d0c2d3aacc0f90995ef3aabbb7477db920b67ec8ce0b82ef0b49ec6e5f53db1;
address public proxyRegistryAddress = 0xa5409ec958C83C3f309868babACA7c86DCB077c1;
mapping(address => bool) private _banned;
mapping(address => bool) private _diamonds;
mapping(address => uint256) private _giveaways;
mapping(address => uint256) private _games;
mapping(address => mapping(uint256 => uint256)) private _lockedTime;
mapping(address => mapping(uint256 => uint256)) private _lockedCode;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
}
// private
function _transfer(
address from,
address to,
uint256 tokenId
) internal override {
if (msg.sender != owner()) {
require(!isLocked(ownerOf(tokenId), tokenId), "token is locked");
require(!isLocked(from, tokenId), "token is locked");
require(!isBanned(from), "address is banned");
require(!isBanned(to), "address is banned");
require(!isBanned(ownerOf(tokenId)), "address is banned");
if (!isDiamond(msg.sender)) {
require(exchangeOpen, "transfers not allowed");
}
}
super._transfer(from, to, tokenId);
}
function _fastMint(address _to, uint256 _mintAmount) private {
uint256 current = _totalSupply.current();
if (_mintAmount == 1) {
_safeMint(_to, current + 1);
} else if (_to.isContract()) {
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, current + i);
}
} else {
for (uint256 i = 1; i <= _mintAmount; i++) {
uint256 tokenId = current + i;
_owners[tokenId] = _to;
emit Transfer(address(0), _to, tokenId);
}
_balances[_to] += _mintAmount;
}
_totalSupply.set(current + _mintAmount);
}
function _setLocked(address _user, uint256 tokenId, uint256 code, bool _state) private {
require(tokenId > 0, "invalid tokenId");
require(
ownerOf(tokenId) == _user,
"lock of token that is not own"
);
if (_state && _lockedTime[_user][tokenId] == 0) {
_lockedCode[_user][tokenId] = code;
_lockedTime[_user][tokenId] = block.timestamp;
_lockedTime[_user][0] += 1;
} else if (!_state && _lockedTime[_user][tokenId] > 0) {
require(_lockedCode[_user][tokenId] == code, "invalid code");
_lockedTime[_user][tokenId] = 0;
_lockedTime[_user][0] -= 1;
}
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public payable
function mint(uint256 _mintAmount) public payable {
mint(msg.sender, _mintAmount);
}
function mint(address _to, uint256 _mintAmount) public payable {
require(!mintPaused, "the contract mint is paused");
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_totalSupply.current() + _mintAmount <= maxSupply, "max NFT limit exceeded");
if (msg.sender != owner() && cost > 0) {
require(msg.value >= cost * _mintAmount, "insufficient funds");
}
_fastMint(_to, _mintAmount);
}
function whitelistedMint(bytes32[] calldata _merkleProof, uint256 _mintAmount) public virtual override payable {
whitelistedMint(msg.sender, _merkleProof, _mintAmount);
}
function whitelistedMint(address _to, bytes32[] calldata _merkleProof, uint256 _mintAmount) public virtual override payable {
require(!whitelistPaused, "the contract whitelist mint is paused");
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_totalSupply.current() + _mintAmount <= maxSupply, "max NFT limit exceeded");
require(isWhitelisted(_to, _merkleProof), "user is not whitelisted");
if (whitelistedCost > 0) {
require(msg.value >= whitelistedCost * _mintAmount, "insufficient funds");
}
_fastMint(_to, _mintAmount);
}
// public write
function unlock(address _user, uint256 tokenId, uint256 code) public virtual override {
_setLocked(_user, tokenId, code, false);
}
function approve(address to, uint256 tokenId) public virtual override {
if (msg.sender != owner()) {
if (!isDiamond(msg.sender)) {
require(exchangeOpen, "transfers not allowed");
}
require(!isLocked(ownerOf(tokenId), tokenId), "token is locked");
require(!isLocked(msg.sender, tokenId), "token is locked");
require(!isLocked(to, tokenId), "token is locked");
require(!isBanned(msg.sender), "address is banned");
require(!isBanned(ownerOf(tokenId)), "address is banned");
require(!isBanned(to), "address is banned");
}
super.approve(to, tokenId);
}
function setApprovalForAll(address operator, bool approved) public virtual override {
if (msg.sender != owner()) {
if (!isDiamond(msg.sender)) {
require(exchangeOpen, "transfers not allowed");
}
require(!isBanned(msg.sender), "address is banned");
require(!isBanned(operator), "address is banned");
}
super.setApprovalForAll(operator, approved);
}
function giveawayMint(uint256 _total, bytes32[] calldata _merkleProof, uint256 _mintAmount) public virtual override {
giveawayMint(msg.sender, _total, _merkleProof, _mintAmount);
}
function giveawayMint(address _to, uint256 _total, bytes32[] calldata _merkleProof, uint256 _mintAmount) public virtual override {
require(!giveawayPaused, "the contract giveaway mint is paused");
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_totalSupply.current() + _mintAmount <= maxSupply, "max NFT limit exceeded");
require(giveawaysOf(_to, _total, _merkleProof) >= _mintAmount, "insufficient giveaways");
_giveaways[_to] += _mintAmount;
_fastMint(_to, _mintAmount);
}
function gameMint(address _to, uint256 _mintAmount) public virtual override {
require(!gamesPaused, "the contract games mint is paused");
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_totalSupply.current() + _mintAmount <= maxSupply, "max NFT limit exceeded");
require(_games[msg.sender] >= _mintAmount, "insufficient games");
_games[msg.sender] -= _mintAmount;
_fastMint(_to, _mintAmount);
}
function lock(address _user, uint256 tokenId, uint256 code) public virtual override {
_setLocked(_user, tokenId, code, true);
}
// public view
function getApproved(uint256 tokenId) public view virtual override returns (address) {
if (msg.sender != owner()) {
if (!isDiamond(msg.sender)) {
require(exchangeOpen, "transfers not allowed");
}
require(!isLocked(ownerOf(tokenId), tokenId), "token is locked");
require(!isLocked(msg.sender, tokenId), "token is locked");
require(!isBanned(msg.sender), "address is banned");
require(!isBanned(ownerOf(tokenId)), "address is banned");
}
return super.getApproved(tokenId);
}
function isApprovedForAll(address _owner, address _operator) public view override returns (bool isOperator) {
if (msg.sender != owner() && _owner != owner()) {
if (!isDiamond(msg.sender) && !isDiamond(_owner)) {
require(exchangeOpen, "transfers not allowed");
}
if (isBanned(msg.sender) ||
isBanned(_owner) ||
isBanned(_operator)) {
return false;
}
}
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry) != address(0) && address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return super.isApprovedForAll(_owner, _operator);
}
function isLocked(uint256 tokenId) public view virtual override returns (bool) {
return isLocked(msg.sender, tokenId);
}
function isLocked(address _user, uint256 tokenId) public view virtual override returns (bool) {
return !disableLocks && (_lockedTime[_user][tokenId] > 0);
}
function lockedAt(uint256 tokenId) public view virtual override returns (uint256) {
return lockedAt(msg.sender, tokenId);
}
function lockedAt(address _user, uint256 tokenId) public view virtual override returns (uint256) {
return _lockedTime[_user][tokenId];
}
function lockedList() public view virtual override returns (uint256[] memory) {
return lockedList(msg.sender);
}
function lockedList(address _user) public view virtual override returns (uint256[] memory) {
uint256[] memory tokenIds = new uint256[](_lockedTime[_user][0]);
uint256 index = 0;
for (uint256 tokenId = 1; tokenId <= 1000; tokenId++) {
if (_lockedTime[_user][tokenId] > 0) {
tokenIds[index] = tokenId;
index++;
}
}
return tokenIds;
}
function isBanned(address _user) public view virtual override returns (bool) {
return _banned[_user];
}
function isDiamond(address _user) public view returns (bool) {
return _diamonds[_user];
}
function isWhitelisted(bytes32[] calldata _merkleProof) public view virtual override returns (bool) {
return isWhitelisted(msg.sender, _merkleProof);
}
function isWhitelisted(address _user, bytes32[] calldata _merkleProof) public view virtual override returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(_user));
return MerkleProof.verify(_merkleProof, whitelistedRoot, leaf);
}
function totalSupply() public view returns (uint256) {
return _totalSupply.current();
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed < tokenId) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
string memory baseExtension = ".json";
return
bytes(currentBaseURI).length > 0
? string(
abi.encodePacked(
currentBaseURI,
tokenId.toString(),
baseExtension
)
)
: "";
}
function giveawaysOf(address _to, uint256 _total, bytes32[] calldata _merkleProof) public view virtual override returns (uint256) {
require(
_to != address(0),
"giveaways query for the zero address"
);
bytes32 leaf = keccak256(abi.encodePacked(_to, _total));
require(MerkleProof.verify(_merkleProof, giveawayRoot, leaf), "invalid proof");
uint256 taken = _giveaways[_to];
if (taken >= _total) {
return 0;
}
return _total - taken;
}
function gamesOf(address _to) public view virtual override returns (uint256) {
require(
_to != address(0),
"games query for the zero address"
);
return _games[_to];
}
// only owner
function setRevealed(uint256 _newRevealed) public onlyOwner {
revealed = _newRevealed;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setProxyRegistryAddress(address _newProxyRegistryAddress) public onlyOwner {
proxyRegistryAddress = _newProxyRegistryAddress;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setWhitelistedCost(uint256 _newWhitelistedCost) public virtual override onlyOwner {
whitelistedCost = _newWhitelistedCost;
}
function setMaxSupply(uint256 _newMaxSupply) public onlyOwner {
maxSupply = _newMaxSupply;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setWhitelistPaused(bool _state) public onlyOwner {
whitelistPaused = _state;
}
function setGiveawayPaused(bool _state) public onlyOwner {
giveawayPaused = _state;
}
function setGamesPaused(bool _state) public onlyOwner {
gamesPaused = _state;
}
function setMintPaused(bool _state) public onlyOwner {
mintPaused = _state;
}
function setExchangeOpen(bool _state) public onlyOwner {
exchangeOpen = _state;
}
function setDisableLocks(bool _state) public virtual override onlyOwner {
disableLocks = _state;
}
function setWhitelistedRoot(bytes32 _newWhitelistedRoot) public virtual override onlyOwner {
whitelistedRoot = _newWhitelistedRoot;
}
function setGiveawayRoot(bytes32 _newGiveawayRoot) public virtual override onlyOwner {
giveawayRoot = _newGiveawayRoot;
}
function locked(address _user, uint256 tokenId, uint256 code, bool _state) public virtual override onlyOwner {
_setLocked(_user, tokenId, _state ? code : _lockedCode[_user][tokenId], _state);
}
function banned(address _user, bool _state) public virtual override onlyOwner {
_banned[_user] = _state;
}
function diamonds(address _user, bool _state) public onlyOwner {
_diamonds[_user] = _state;
}
function diamonds(address[] memory _users, bool _state) public onlyOwner {
for (uint256 i = 0; i < _users.length; i++) {
_diamonds[_users[i]] = _state;
}
}
function transferFromBanned(address _to, uint256 tokenId) public virtual override onlyOwner {
address from = ownerOf(tokenId);
require(isBanned(from), "address is not banned");
super._transfer(from, _to, tokenId);
}
function transferFromSelf(address to, uint256 tokenId) public onlyOwner {
super._safeTransfer(msg.sender, to, tokenId, "");
}
function addGames(address _to, uint256 _newGames) public virtual override onlyOwner {
require(
_to != address(0),
"add games for the zero address"
);
_games[_to] += _newGames;
}
function removeGames(address _to, uint256 _newGames) public virtual override onlyOwner {
require(
_to != address(0),
"remove games for the zero address"
);
_games[_to] -= _newGames;
}
function withdraw() public payable onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
}
{
"compilationTarget": {
"HollywoodApesV2.sol": "HollywoodApesV2"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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